Winter Weather in São João de Pirabas Brazil

Daily high temperatures are around 87°F, rarely falling below 84°F or exceeding 90°F. The highest daily average high temperature is 88°F on June 10.

Daily low temperatures are around 76°F, rarely falling below 74°F or exceeding 78°F.

For reference, on June 8, the hottest day of the year, temperatures in São João de Pirabas typically range from 77°F to 88°F, while on September 27, the coldest day of the year, they range from 75°F to 85°F.

The figure below shows you a compact characterization of the hourly average winter temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Mendaha, Indonesia (10,425 miles away); City of Balikpapan, Indonesia (11,340 miles); and Ternate, Indonesia (12,074 miles) are the far-away foreign places with temperatures most similar to São João de Pirabas (view comparison).

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The winter in São João de Pirabas experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 68% to 41%. The lowest chance of overcast or mostly cloudy conditions is 36% on August 11.

The clearest day of the winter is August 11, with clear, mostly clear, or partly cloudy conditions 64% of the time.

For reference, on April 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 85%, while on August 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In São João de Pirabas, the chance of a wet day over the course of the winter is very rapidly decreasing, starting the season at 77% and ending it at 25%.

For reference, the year's highest daily chance of a wet day is 95% on April 7, and its lowest chance is 11% on October 23.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the winter in São João de Pirabas is very rapidly decreasing, starting the season at 8.0 inches, when it rarely exceeds 12.2 inches or falls below 3.6 inches, and ending the season at 1.2 inches, when it rarely exceeds 2.5 inches or falls below 0.2 inches.

Over the course of the winter in São João de Pirabas, the length of the day is essentially constant. The shortest day of the winter is June 21, with 12 hours, 5 minutes of daylight and the longest day is August 31, with 12 hours, 6 minutes of daylight.

The earliest sunrise of the winter in São João de Pirabas is 6:04 AM on June 1 and the latest sunrise is 9 minutes later at 6:12 AM on July 24.

The earliest sunset is 6:09 PM on June 1 and the latest sunset is 9 minutes later at 6:17 PM on July 25.

Daylight saving time is not observed in São João de Pirabas during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 6:01 AM and sets 12 hours, 10 minutes later, at 6:12 PM, while on June 20, the shortest day of the year, it rises at 6:08 AM and sets 12 hours, 5 minutes later, at 6:12 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the winter of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in São João de Pirabas is essentially constant during the winter, remaining around 100% throughout.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in São João de Pirabas is rapidly increasing during the winter, increasing from 8.0 miles per hour to 10.6 miles per hour over the course of the season.

For reference, on October 23, the windiest day of the year, the daily average wind speed is 11.0 miles per hour, while on April 25, the calmest day of the year, the daily average wind speed is 7.5 miles per hour.

The hourly average wind direction in São João de Pirabas throughout the winter is predominantly from the east, with a peak proportion of 100% on August 10.

São João de Pirabas is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in São João de Pirabas is essentially constant during the winter, remaining within 1°F of 83°F throughout.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in São João de Pirabas are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in São João de Pirabas are very rapidly decreasing during the winter, decreasing by 8,217°F, from 10,073°F to 1,856°F, over the course of the season.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in São João de Pirabas is very rapidly increasing during the winter, rising by 2.0 kWh, from 4.8 kWh to 6.8 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of São João de Pirabas are -0.775 deg latitude, -47.177 deg longitude, and 85 ft elevation.

The topography within 2 miles of São João de Pirabas contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 35 feet. Within 10 miles also contains only modest variations in elevation (217 feet). Within 50 miles also contains only modest variations in elevation (387 feet).

The area within 2 miles of São João de Pirabas is covered by water (40%) and trees (38%), within 10 miles by trees (47%) and water (33%), and within 50 miles by water (56%) and trees (26%).